Claims
- 1. A process for forming a one component RTV silicone rubber composition with good bonding properties at high humidity conditions, comprising:
- (1) mixing
- (A) 100 parts by weight of a silanol end-stopped diorganopolysiloxane polymer having a viscosity from 100 to 1,000,000 centipoise at 25.degree. C. where the organo groups are monovalent hydrocarbon radicals;
- (B) from 0.1 to 10 parts by weight of an acyloxy functional cross-linking agent of the formula
- R.sub.m Si(OR.sup.1).sub.4-m
- where R is a monovalent hydrocarbon radical of 1 to 8 carbon atoms, R.sup.1 is an acyl radical of 2 to 30 carbon atoms, and m is 0 or 1;
- (C) from 0.01 to 10 parts by weight of a curing promoter which is a salt of a carboxylic acid; and
- (D) about 4 parts by weight of a magnesium or zinc salt of a carboxylic acid as an acid scavenger.
- 2. A process for forming a one-component RTV silicone rubber composition with good bonding properties even at high humidity conditions, comprising:
- (1) mixing
- (A) 100 parts by weight of a silanol end-stopped diorganopolysiloxane polymer having a viscosity from 100 to 1,000,000 centipoise at 25.degree. C., where the organo groups are monovalent hydrocarbon radicals;
- (B) from 0.1 to 10 parts by weight of an acyloxy functional cross-linking agent of the formula
- R.sub.m Si(OR.sup.1).sub.4-m
- where R is a monovalent hydrocarbon radical of 1 to 8 carbon atoms and R.sup.1 is an acyl radical of 2 to 30 carbon atoms, m is 0 or 1;
- (C) from 0.01 to 10 parts by weight of a curing promoter which is a metal salt of carboxylic acid; and
- (D) about 4 parts by weight of acid scavenger selected from the group consisting of zinc stearate and magnesium stearate.
Parent Case Info
This application is a continuation of application Ser. No. 363,629, filed Mar. 30, 1982, now abandoned.
US Referenced Citations (11)
Continuations (1)
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Number |
Date |
Country |
Parent |
363629 |
Mar 1982 |
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